From Ancestry.com Wiki

Belvidere is a town in Lamoille county, Vermont. It was formed in 1791 in Vt. from Franklin county. The probate and court district for Belvidere is Lamoille. For more information, contact the town at 3996 VT Rt 109, Belvidere Center 05442. On the attached map, Belvidere is shown as 1 in Lamoille county.